@article{Krueger2020OutofDistributionGV,
  title={Out-of-Distribution Generalization via Risk Extrapolation (REx)},
  author={David Krueger and E. Caballero and J. Jacobsen and A. Zhang and Jonathan Binas and R{\'e}mi Le Priol and Aaron C. Courville},
  journal={ArXiv},
  year={2020},
  volume={abs/2003.00688}
}